﻿MOLIUSCA. 
  5U5 
  

  

  91. 
  Trochus 
  (Monodonta) 
  australis, 
  Lamarch. 
  

   Glorioso 
  Islands, 
  on 
  the 
  reefs. 
  

  

  92. 
  Trochus 
  (Monodonta) 
  laMo, 
  Linne. 
  

   Seychelles, 
  on 
  the 
  beach. 
  

  

  93. 
  Cylichna 
  protracta. 
  

  

  Gould, 
  Proc. 
  Bost. 
  Soc. 
  Nut. 
  Hist. 
  1859, 
  vol. 
  vii. 
  p. 
  140 
  ; 
  Otia, 
  p. 
  113. 
  

   Cerf 
  Island, 
  Mascarenes, 
  in 
  10 
  fms. 
  ; 
  coast 
  of 
  China 
  (Gould). 
  

  

  94. 
  Tornatina 
  voluta, 
  Quoy 
  ^ 
  Oahnard. 
  

   Providence 
  Reef, 
  Mascarenes, 
  in 
  24 
  fms. 
  

  

  95, 
  Pyramidella 
  (Lonchaeus) 
  maculosa, 
  Lamarch. 
  

   Poivre 
  Island, 
  in 
  20 
  fms. 
  

  

  90. 
  PyramideUa 
  (Obeliscus) 
  terebellum, 
  Muller. 
  

   African 
  Island. 
  

  

  97. 
  Pyramidella 
  (Obeliscus) 
  sulcatus. 
  

  

  Obeliscus 
  sulcatus 
  {Nuttcdl, 
  MS.), 
  A. 
  Adams 
  in 
  Sowerby''s 
  Thesaurus, 
  

   vol. 
  ii. 
  p. 
  807, 
  pi. 
  171. 
  fig. 
  34 
  ; 
  Soiverhy, 
  Conch. 
  Icon. 
  vol. 
  xv. 
  

   figs. 
  12 
  a, 
  b. 
  

  

  Providence 
  Reef, 
  Mascarenes, 
  in 
  24 
  fms. 
  

  

  This 
  species 
  was 
  collected 
  at 
  the 
  Sandwich 
  Islands 
  by 
  Nuttall, 
  

   and 
  Tahiti 
  is 
  assigned 
  to 
  it 
  as 
  the 
  locality 
  by 
  Mr. 
  A. 
  Adams. 
  

  

  98. 
  Chemnitzia 
  coppingeri. 
  (Plate 
  XLIV. 
  fig. 
  W.) 
  

  

  Shell 
  elongate, 
  subulate, 
  pink, 
  with 
  large 
  distant 
  white 
  varices. 
  

   Whorls 
  18?; 
  the 
  12 
  remaining 
  are 
  convex 
  at 
  the 
  sides, 
  separated 
  by 
  

   a 
  deepish, 
  slightly 
  oblique 
  suture, 
  longitudinally 
  finely 
  ribbed 
  and 
  

   spirally 
  lirate. 
  Ribs 
  twice 
  as 
  broad 
  as 
  the 
  grooves 
  between 
  them, 
  

   about 
  26 
  on 
  the 
  penultimate 
  whorl, 
  subnodose 
  where 
  they 
  meet 
  the 
  

   transverse 
  lira3 
  ; 
  these 
  are 
  about 
  1 
  1 
  in 
  number 
  on 
  the 
  penultimate 
  

   and 
  about 
  24 
  on 
  the 
  last 
  whorl, 
  those 
  on 
  the 
  lower 
  part 
  rather 
  finer 
  

   than 
  those 
  above. 
  Varices 
  large, 
  almost 
  one 
  on 
  every 
  volution, 
  

   transversely 
  sulcated. 
  Aperture 
  subquadrate, 
  nearly 
  as 
  wide 
  as 
  

   long. 
  Columella 
  straight, 
  subtruncate 
  and 
  uniplicate 
  anteriorly. 
  

   Labrum 
  arcuate, 
  externally 
  variced. 
  Length 
  of 
  twelve 
  remaining 
  

   whorls 
  18 
  millims., 
  diameter 
  4-j- 
  millim. 
  

  

  Providence 
  Reef, 
  Mascarenes, 
  in 
  24 
  fms. 
  

  

  